In clothing, clothing size refers to the label sizes used for garments sold off-the-shelf. There are a large number of standard sizing systems around the world for various garments, such as dresses, tops, skirts, and trousers. Made-to-order garments require measurements to be taken, but these do not need to be converted into national standard form.
Before the invention of clothing sizes in the early 1800s, all clothing was made to fit individuals by either tailors or makers of clothing in homes. Then garment makers noticed that the range of human body dimensions was relatively small. Therefore sizes were invented to allow mass production of garments.
Standard sizes take into account the combinations of body measurements of the general population: